Apparatus for producing depressions in metal printing-plates.



M; WAGHSMUNDT, A. KURZ & G. JAGOBI. APPARATUS FOR PRODUCING DEPRESSIONSIN METAL PRINTING PLATES.

APPLICATION FILED AUG. 4. 1909 Patented Jan. 25, 1910.

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M. WAUHSMUNDT, A. KURZ & G. JAGOBI. APPARATUS FOR rnonncma DEPBESSIONS mMETAL PRINTING PLATES.

APPLICIATIOH FILED AUGJ. 1909. 947,264. Patented Jan. 25, 1910.

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max wncnsmonnr .AND AL'WIN KURZ, 0F BERLIN, AND CARL JAGOBI, OFSfiDENDE, NEAR BERLIN, GERMANY.

APRA BATUS FOR PRODUCING DEPRESSIONS IN METAL PRINTING-PLATESSpecification of Letters Patent.

Patented J an. 25, 1910.

Application filed August 4, 1909. Serial No. 511,1201}.

i l l l i i It has been attempted to produce depressions in metalprinting plates, by hammering, With the assistance of special apparatus,or by rolling, by means of cylinders, or by stamping entire Words in oneoperation. All

such prior apparatus, because of great drawbacks, have not led to anyuseful results. The hammering process has the tltflwlmflli that thedepressions are not uniformly deep, and that the top surface is deformedby depressions etc. The same drawbacks occur in the rolling process,which has the further drawback that the stamps are easily do formed andthat no accurate adjustment of the words can. be effected.

, When simultaneously stain ing several letters forming a word, it is dicult to obtain a uniform depth. Moreover, owing to the great pressurerequired both surfaces of the plate are very easily bulged or rendereduneven, which is of reat disadvantage in the printing process. VVeovercome these drawbacks, and also accurately adjust the depressions,and also of the stamp spindle. According to our invention, thedepressions in the metal plates, such as copper, steel, iron, zinc,brass etc., are not. obtained, as hereto fore, by engraving or bystamping entire words in one operation, but separate constituent parts,such as letters, or signs (for example, music, or decorative matter) arestamped one after the other in the metal plates, in order, by thussingly making; such impressions. to form entire words, signs. or entireprinting plates.

By so doing,we have found that all deformation of the surface of 1 theprinting plate, such as b 'llges or unevennesses, are avoided, and thatthe depth of the various depressions, as Well as the place, at

which they are applied, can be accurately adjusted.

\Ve are aware that stamping apparatus already exist, which enableseveral single depressions to be made one after the other in a metalplate, but still such devices can only be used for copying, while,according to our present invention, the separate types can be combinedaccording: to desire and used for producing quite different originalplates.

Our machine, which enables names etc. to be indented in printing plates,is shown in Figure l in plan, in Fig. 2 in side elevation. and in Fig. 3in front elevation, while Fig. 4 shows the pressing piece in plan, Fig.5 in front elevation and Fig. (l in side oleva tion.

a is the base plate, which carries all the working parts of the ma chineand also serves a support for the copper plate to be indented. The slidecarriage I), which is adapted to be moved, lengthwise of the base plate,by the toothed wheels I, engaging in the toothed racks ll. and is guidedin grooves of said base plate. Said toothed wheels I are secured on theshaft I which is jonr nalcd in the bearings Z. At each end of the shaftthere is a slot V, in which a pin on a crank Vi can engage, and by thismeans. the shaft can be operated from either of its ends. A second, andsmaller, slide or carriage #1 moves in grooves of the carriage h, and atright angles to the movement ofthe latter. A standard {3, together witha spindle Vlll. and lly-lerer, f, are adapted to be n'lov'cd lengthwiseof the slide or carriage (a and backward and forward, by a spindle 2'.This spindle i is journaled in bearings 2 and I. and is adapted to beturned by the hand wheel in through the agency of the toothed wheels Xand j, the latter of which is journaled in the top part of the hearing7. The aforesaid spindle Vlll in the standard (1 carries at its lowerend (Figs. 5 and l), pressing piece or lining: IX, which is held totliespindlc by a pin XI passing tin-(nigh a groove around the latter andthrough the pressing piece itself. In order to prevent the pressingpiece IX from turning during the hereinafter-described stamping opera- Iings a are provided in the standard d. At

- pointer, t, fitted within the slot of the typetion, a. longitudinalguide is rovided in the standard (1, through which t ie pin 112 (Fig. 1)passes, and the lower half of the pin fits the guide hole XII (Figs. 4,5 and 6) of the pressing piece IX.

A type holder 6 in the slide 0 is kept in a perpendicular or parallelposition in regard to the base plate a by four screws 0, in order toassure that the type to be indented always 1 act perpendicularly on thecopper plate. For the purpose of printing the names in proper positionon the copper plate there is a pointer it inside the type holder 6. Thescrew g provided with the screw head VII passes through the screwthreaded guide It, opens out into the slot of the type holder 6 andpresses against the lining 8. By the screw g the types inserted into theholder e g are, pressed side by side, in such relation, i however,'thatthey can be pressed down one at a time.

Before beginning the stamping operation, the carriage b is secured bythe screws III and the carriage c by the screws in in order to preventthese carriages from being displaced. The spring 9 (Figs. 1 and 3) isprovided in order to keep the carriage c, at right Y angles whilesliding on the carriage b. For the purpose of rendering the results ofthe stamping operation visible, inclined openthe top of the latter issecured the circular scale 1, which, together with a pointer '11 (thelatter depending from the fly lever, f), enables the depth of theletters to be regulated. On the scale 2' is also provided a loosepointer .20, which to avoid mistakes is'adjusted to the numeral inquestion. The clamps IV (Figs. 1 and 2) overhang and serve to secure thecopper plate.

The operation of the described machine is as follows: Supposing it isdesired to stamp a name at a certain point on a. copper plate, thelatter is placed on the base plate a and fastened by the clam 5 1V.Thereafter the type holder 6 is ad]usted to the point at which thestamping is to be efiected the holder, (2, being above the desired pointat which the stamping is to be commenced, whereupon the type coming intoquestion for the particular name are composed and put into said slot,and held in place by the screw The standard (I is then moved so that thepressing piece 1X brought exactly over the middle of said type composingsaid name, whereafter the spindle-is screwed down and one of the type isthus pressed to the desired depth into the plate. When this has beendone, the spindlb is screwed up again and adjusted to act on the middleof another of the type, which operation is repeated until the whole rowhas been printed one by one. As

soon as the name is finished the bur is ground oil", and the plate isthen ready for printing.

In order to be able to accurately adjust the point, at which theindentation has to be made in the plate, the carriage b can be movedalong a scale XIII rovided on the base plate IQ, a pointer xn beingprovided to facilitate the adjustment. Further the carriage a can bemoved with the assistance of a second pointer XV along a second scaleXVI provided on the carriage I). These' scales XIII and XVI are disposedat an angle to each other, so that an accurate adjustment of the typecan be efi'ected both longitudinally and transversely.

Instead of longitudinally and transversely adjusting the stamping deviceb the above described means, the process can e reversed, that is 1p say,the stamping device may be made stationary and the metal printing platecan be adapted to be adjusted underneath the stamps. The pressure mayalso be exerted in the opposite direction, so that, instead of the typebeing moved toward the plates, the plate may be moved toward the type,it being in both cases of no moment, whether the pressure between thetype and the plate is etfected by mechanical pneumatic hydraulic orelectric meansr What we claim is:

1. In an apparatus for reducing depressions in metal printing p ates, abase plate serving as a support for a metal plate, a carriage slidableon said base-plate, a second carriage slidably carried by that firstnamed and movable thereon at anangle to the path of travel of saidfirst-named carriage, a typeholder on. the second-mentioned carriage, astandard supported by said second-named carriage and slidable thereon, aspindle ca'r-' ried by the standard, and a pressing piece on the spindleand adapted to press against type, when in said holder, against a metalplate when supported by the base plate.

2. In an apparatus for producing depressions in metal printing-plates, acarriage provided with a type-holder, a standard carried by and slidableon said carriage, a spindle carried by the standard and adapted to pressagainst type, when in said holder against a metal plate.

ln an apparatus for producing depressions in metal printing-plates, astandard, a plate carried thereby and bearing a scale, a loose pointermovable relatively to said scale,

a spindle in the standard, a fiy-lever for m0v-- ing said spindle insaid standard, and a second pointer carried by the spindle and movablerelatively to the scale and independently of the first-mentioned ointer.

4. In an ap aratus or roducing depressions in meta printing-p ates, abase-plate bearing a scale, a carriage movable and also bearing a scale,a pointer carried by uur hands: in the presence of two subscribing l thecarriage for indicating markings on the wiinvssvs. first-named scale, asecond carriage movable i MAX VVACH SMUNDT. at an angle to the path ofthat first named, GAVIN KURZ. 5 and n pointer carried by said second carCARL JACOPJ.

riage for infhmting markings on the second- \\"ituesses: named scale.FRANZ SPHWENTERLEY.

In witness whereof we have hereunLo set HENRY HASPER.

